The relationship can develop when Ash participates in Pokemon contests in a region where Latios and Latias are revered. He uses their grace and unique powers as inspiration for his performances. In return, they start to see Ash as a worthy friend. They might even join in his performances secretly, adding a magical touch that makes Ash stand out in the contests.
Through shared adventures. For instance, if they get lost in a mysterious forest together. Ash would rely on Latios or Latias's ability to sense their surroundings and they would grow closer as they face the challenges of finding their way out. It could be as simple as Ash sharing his food with them during this time, showing kindness.
A good plot. It should have an interesting story that involves Ash, Latias, and Latios in a meaningful way. Maybe it could be about their adventures together, or a special bond that forms between them.
One idea could be that Ash forms a special bond with Latios and Latias while on a journey in a new region. They help him discover a hidden power within himself. For example, Latios might be able to sense when Ash is about to make a wrong move in a battle and communicate it to him telepathically.
You can start by looking on fanfiction websites like FanFiction.net or Archive of Our Own. They have a large collection of fanfics related to various characters, including Ash, Latias, and Latios. Just use the search function on these sites and type in the relevant tags.
Another theme is protection. Latios and Latias are powerful Pokémon, and in fanfictions, they might protect Ash from various threats, whether it's other powerful Pokémon or some evil organizations. And sometimes, Ash also tries to protect them in return. For example, in some stories, an evil team might be after Latios and Latias for their powers, and Ash steps up to defend them. There can also be themes of exploration, where they all travel to new and mysterious places in the Pokémon world together, discovering new Pokémon species and secrets along the way.
His confidence could grow in a different way. Usually, Ash is confident in battles, but this time, when he catches these rare Pokémon, he might gain confidence in his ability to understand and bond with Pokémon that are very different from the ones he's used to. He could start to see himself as a more well - rounded Pokémon trainer, not just one who battles but also one who can form deep connections with all kinds of Pokémon.
Ash's journey to Latias and Latios town in the fanfiction could be filled with surprises. He may discover ancient secrets about the town and the two Pokemon. Since Latias and Latios are quite powerful, Ash could team up with them to face a common enemy. There might also be some new characters in the town that Ash befriends, and together they have all kinds of exciting experiences.
Perhaps in this fanfiction, Ash goes to the town in search of a rare Pokemon item. But when he arrives, he discovers that Latias and Latios are in trouble because of some evil forces. So, Ash decides to help them out. He uses his battle skills and knowledge of Pokemon to fight against these forces. Along the way, he also learns about the unique culture and traditions of the town.
Well, it often starts with curiosity. Latias might be intrigued by Ash's determination and kindness. So she starts to observe him from a distance. Then, as she gets closer, Ash might notice her presence and start to interact with her. Their relationship grows as they face challenges together, like battling other trainers or saving Pokemon in danger. Eventually, it can turn into a deep friendship or something more romantic in some fanfictions.
I really like 'Latias and Latios: A New Beginning'. In this fanfiction, they encounter a new type of Pokemon that has never been seen before. It shows how they adapt to this new situation and how their relationship evolves as they try to figure out what this new Pokemon is all about. It's full of mystery and adventure, which makes it a great read for any Pokemon fan.
One possible plot twist could be that Latios and Latias are actually under the control of a more powerful and evil Pokémon. Ash initially thinks he's caught them to protect them, but then discovers he has to fight against the real threat that has been manipulating them all along.